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ISO 914:1977

Sulphuric acid and oleum for industrial use — Determination of total nitrogen content — Titrimetric method after distillation

Nov 1, 1977
95.99   Withdrawal of Standard   May 27, 2002

General information

95.99     May 27, 2002

ISO

ISO/TC 47

International Standard

71.060.30  

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Scope

The method is applicable to products having a total nitrogen content equal to or greater than 0.05 % (m/m). The principle consists in the conversion of the nitrogen present in a test portion to ammonia by means of nascent hydrogen. Distillation and absorption of the ammonia in an excess of standard volumetric sulphuric acid solution, and back-titration with a standard volumetric sodium hydroxide solution in the presence of an indicator. - Replaces ISO Recommendation R 914-1968.

Life cycle

NOW

WITHDRAWN
ISO 914:1977
95.99 Withdrawal of Standard
May 27, 2002

National adoptions

SRPS H.B8.013:1981  
ISS

Sulphuric acid and oleum for industrial use — Determination of total nitrogen content — Titrimetric method after distillation

95.99   Withdrawal of Standard

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